ICD-10-CM 2027 diagnosis code

O20Hemorrhage in early pregnancy

Not billable — use a more specific code

O20 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About O20

O20 is the ICD-10-CM diagnosis code for hemorrhage in early pregnancy. It belongs to block O20-O29 (other maternal disorders predominantly related to pregnancy) and chapter 15 (pregnancy, childbirth and the puerperium). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: O20.0 (abortion), O20.8 (pregnancy) and O20.9 (unspecified).

Don't report O20 together with the conditions in its Excludes1 note: pregnancy with abortive outcome (O00-O08).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under O20

Coding notes

IncludesFurther defines the content of the category

hemorrhage before completion of 20 weeks gestation

Excludes1Not coded here — never report together with this code

pregnancy with abortive outcome (O00-O08)

Notes that apply from higher levels

Instructions written at a parent level also apply to O20.

Broader instructions also apply from O20-O29 Other maternal disorders predominantly related to pregnancy and Chapter 15: Pregnancy, childbirth and the puerperium.

Codes whose notes reference O20

O46Excludes1

Code history

2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about O20

Is O20 billable?: No. O20 is a header code. Report one of its more specific subcodes instead.